The invention relates to a battery pack (50) comprising a housing (72) in which at least one battery module (60) having at least one battery cell (2) is arranged, as well as a cooling system for cooling said at least one battery cell (2). The cooling system at least comprises a cooling plate (62) arranged outside the housing (72), said at least one cooling plate (62) lying flat against a cover plate (80) of the housing (72) and heat dissipating from the at least one battery cell (2) to the cooling plate (62) through said cover plate (80).